What type of brake fluid should I use with this Wilwood caliper?

These Wilwood GNX4 caliper assemblies are designed exclusively for use with DOT 5 silicone brake fluid. It is critical not to use DOT 3, DOT 4, or DOT 5.1 fluids, as this can lead to caliper damage and seal failure.

What makes the stainless steel pistons better than stock?

Stainless steel pistons resist rust and bore pitting that can plague OE caliper designs. This helps ensure consistent performance and longevity, preventing issues that can arise from corrosion.

Does this caliper come with brake pads or mounting hardware?

The manufacturer description does not specify if brake pads or mounting hardware are included with this caliper. Please refer to the product listing details or contact customer support for a complete list of included components.

Wilwood GNX4 Brake Caliper 1.88in Pistons 1.00in Disc 120-10

Name: Wilwood Caliper-GNX4 1.88in Pistons 1.00in Disc
Brand: Wilwood
SKU: wilwood-wilwood-caliper-gnx4-1-88in-pistons-1-00in-disc-t14-138897
Price: 683.32 USD
Availability: BackOrder

Wilwood Caliper-GNX4 1.88in Pistons 1.00in Disc

$683.32

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Wilwood Caliper-GNX4 1.88in Pistons 1.00in DiscBRAKE CALIPER

Key Features

This product is a single Wilwood GNX4 brake caliper.
Features 1.88-inch stainless steel pistons for strong clamping force.
Designed for use with 1.00-inch thick brake discs.
The caliper body is forged from billet aluminum for strength and reduced weight.
Includes high-temperature seals to prevent leaks and failures.
Finished with a durable clear coat anodizing over a natural aluminum body.

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Product Details

What you get here is a single Wilwood GNX4 brake caliper, built with advanced design tools like FEA and 3-D modeling. This caliper is designed to give you a solid pedal feel and strong clamping force, all while being lighter than many factory calipers. It's a well-built piece intended to improve your braking performance.

The body of this caliper is forged from billet aluminum, which is a strong material that also helps keep the weight down. Inside, you'll find stainless steel pistons, which resist rust and pitting much better than the cast iron or aluminum pistons found in some stock calipers. Wilwood also uses high-temperature seals to prevent leaks and failures, even under hard use. The natural aluminum finish is protected by a clear coat anodizing, which adds durability. It's important to note that these calipers are specifically made to work with DOT 5 silicone brake fluid only. Using DOT 3, DOT 4, or DOT 5.1 fluids with this caliper can cause damage and seal failure.

This caliper is a serious upgrade for anyone looking to improve their braking system. Make sure you have the correct brake fluid on hand before installation, as using the wrong type will cause problems down the line. If you're rebuilding your braking system or looking for a noticeable improvement in pedal response and clamping power, this Wilwood caliper is a solid option.